[Speex-dev] echo cancellation on PDA

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Thu Nov 2 14:30:11 PST 2006

>> Are you by any chance using an insane sampling rate and/or tail length.
>> Try a sampling rate of 8000 Hz, 128-sample frame size and 1028-sample
>> tail length.
> In my appliation, the sampling rate is 8000 Hz, and time stamp is
> 20ms, doesn't it mean I should initialize echo_state like
> speex_echo_init_state(160,n*160)?

That's fine -- as long as n is reasonable, let's say in the order of 8.
Are you using just the echo canceller or the preprocessor too (try just
the echo canceller).


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